Bio Spot Spot On for Dogs under 15 lbs., 6 Month Supply Kills and repels fleas ticks and mosquitoes for up to 30 days Contains an insect growth regulator IGR to kill flea eggs up to one month and prevent reinfestation Contains a natural coat conditioner Kills and repels fleas ticks and mosquitoes for up to 30 days Contains an insect growth regulator IGR to kill flea eggs up to one month and prevent reinfestation Contains a natural coat conditioner This item is not for sale in Catalina Island